The 5 Essentials in Every Powerful Painting
The 5 Essentials don't only apply to paintings, but to any picture. Although the essentials are what you'd expect (good composition, good use of value and color...), the book breaks each one down in detail with striking examples. The paintings throughout the book are inspiritation, particularly in their use of color and value, and I find myself leafing through it periodically for inspiration. The book jacket has already become framed from me perusing it.